From ff9b8bb838ecdfbfc1dc81038fcf3b2a87636982 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Zrounba?=
 <6691770+clement-z@users.noreply.github.com>
Date: Sat, 30 Sep 2023 23:06:01 +0200
Subject: Initial release

---
 src/devices/bitstream_source.cpp | 76 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/devices/bitstream_source.cpp

(limited to 'src/devices/bitstream_source.cpp')

diff --git a/src/devices/bitstream_source.cpp b/src/devices/bitstream_source.cpp
new file mode 100644
index 0000000..f2e38a6
--- /dev/null
+++ b/src/devices/bitstream_source.cpp
@@ -0,0 +1,76 @@
+#include <bitstream_source.h>
+
+#include <random>
+#include <cstdlib>
+
+using std::cout;
+using std::endl;
+
+unsigned int BitstreamSource::m_bits_per_value = 8;
+//double BitstreamSource::m_output_jitter = 0.0;
+
+void BitstreamSource::runner()
+{
+    // Initialize random number generator
+    //mt19937 gen(m_seed);
+    //uniform_int_distribution<> dis(1, m_max_value); // uniform in [1, max]
+    //int operation_mode = 0; // 0: modulated source , 1: independent pulses
+
+    auto max_val = pow(2.0, m_bits_per_value) - 1;
+
+    cout << name() << ":" << endl;
+    cout << "signal on: " << m_signal_on << endl;
+    cout << "signal off: " << m_signal_off << endl;
+    cout << "bits: ";
+    cout << endl;
+
+    for(const auto &val : m_values) {
+        auto val_saturated = val;
+        if (m_current_value > max_val)
+            val_saturated = max_val;
+
+        for (unsigned int iBit = 0; iBit < m_bits_per_value; ++iBit) {
+            bool bit = val_saturated & (1 << iBit);
+            cout << bit;
+        }
+    }
+    cout << " --> " << (dynamic_cast<sc_signal<OpticalSignal> *>(p_out.get_interface()))->name();
+    cout << endl;
+    cout << endl;
+
+    // Loop over all values
+    for (unsigned int iVal = 0; iVal < m_values.size(); ++iVal) {
+        m_current_value = m_values[iVal];
+
+        if (m_current_value > max_val)
+            m_current_value = max_val;
+
+        for (unsigned int iBit = 0; iBit < m_bits_per_value; ++iBit) {
+            // Wait at least one clk cycle, and for enable to be high
+            do {
+                // Wait next clk edge
+                wait();
+                cout << "CLK tick (" << this->name() << ")" << endl;
+            } while (!p_enable->read());
+            
+            // Deduce bit "value" from binary representation
+            // iBit = 0 represents LSB
+            bool bit = m_current_value & (1 << iBit);
+
+            // Initialize corresponding signal
+            auto s = (bit ? OpticalSignal(m_signal_on) :
+                            OpticalSignal(m_signal_off));
+
+            s.getNewId(); // New Id is necessary to notify signal change
+
+            // Send signal to output with no delay
+            m_out_writer.delayedWrite(s, SC_ZERO_TIME);
+        }
+    }
+
+    // Wait for end of simulation
+    while (true) {
+        // Do nothing
+        wait();
+    }
+}
-- 
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